BXM Port Access UNI Ingress Operation | Cisco Systems 8600 Series

BXM Functional Description

Figure 6-9 BXM Port (Access UNI) Ingress Operation

6-18Cisco BPX 8600 Series Reference

Image 148

Cisco Systems 8600 Series manual BXM Port Access UNI Ingress Operation

Contents

Cisco BPX 8600 Series Reference Release MayPage Page Page About This Manual Chapter Introduction BPX Switch Common Core Chapter General Description Chapter Service Interface Line Cards Chapter Network Interface Trunk Cards Simba BXM T3/E3, 155, Chapter ATM Connections Chapter Tag Switching Chapter ATM and Frame Relay SVCs SPVCs Chapter BME Multicasting Chapter Repair and Replacement 11-1 Chapter Frame Relay to ATM Network Service Interworking 12-1 Chapter Tiered Networks 13-1 Chapter BPX Snmp Agent 14-1 Appendix B BPX Switch Cabling Summary Appendix a BPX Node SpecificationsAppendix C BPX Switch Peripherals Appendix D AT3-6ME Interface Adapter Appendix E Glossary Index F I G U R E S Xviii Cisco BPX 8600 Series Reference List of Figures Dial-Modem Cabling for Auto Answer Dial-In to BPX T a B L E S Table A-1 Table B-1Table B-2 Table B-3 Table C-1 Table C-2Table C-3 Table C-4 Xxiv Cisco BPX 8600 Series Reference Cisco WAN Switching Product Name Change About This ManualObjectives Audience Organization Chapter Tag Switching Chapter Repair and ReplacementChapter Frame Relay to ATM Network and Service Interworking Appendix a BPX Node Specifications Conventions Related DocumentationRelated Documentation Conventions Xxx Cisco BPX 8600 Series Reference General Description IntroductionBPX Capabilities Extended Services Processor General Description BPX Switch General Configuration Example Continuing Features with Release BPX SwitchMGX IGX Switch New with Release Continuing Features with Release Network IMATM-B BPX Switch Operation Access ProductsBPX Switch Operation BPX Switch Operation BPX Switch with MGX 8220 Shelves Tag SwitchingBPX Switch with Extended Services Processor Frame Relay to ATM Interworking Frame Relay to ATM Network Interworking Tiered Networks Service InterworkingAdditional Information Routing Hubs and Interface Shelves BPX Switch Routing Hubs Tiered Network with BPX Switch and IGX Switch Routing Hubs Inverse Multiplexing ATM Virtual Trunking Virtual Trunking Example FairShare Traffic and Congestion ManagementTraffic and Congestion Management AutoRoute OptiClassCost-Based AutoRoute Congestion Management, VS/VD Congestion Management, ForeSight Network Interfaces Network ManagementNetwork Management Statistical Alarms and Network Statistics Service InterfacesNode Synchronization Switch Software Description Switch Software DescriptionConnections and Connection Routing Connection Routing Groups Major Features of Cost-Based AutoRoute Cost-Based Connection Routing 22Cisco BPX 8600 Series Reference Network Synchronization Cost-Based AutoRoute CommandsNetwork Synchronization Switch Availability Node AlarmsSwitch Availability Node Redundancy Switch Availability 26Cisco BPX 8600 Series Reference General Description BPX Switch EnclosurePhysical Description BPX Switch Exterior Front View Physical Description Node DC Powering Node Cooling Optional AC Power Supply Assembly DC Power Entry Module Shown with Conduit Box Removed Card Shelf Configuration AC Power Supply Assembly Front View BPX Switch Card Shelf Front View Functional Description Physical LayerATM Layer Functional Description ATM Cell Headers ATM Cell Format Functional Description UNI Header NNI Header STI Header Functional Description STI Header ATM Cell Addressing ATM Adaptation LayerAAL Smds IPX and IGX Switch Trunk Interfaces to ATM 11 SAR Adaptation Process BAM FastPacket Adaptation to ATM STICAM UNI SAM UNI Complex Gateway, Frame Relay to ATM Network Interworking Simple GatewaySimple and Complex Gateway Formats BPX Switch Major Groups BPX Switch Major GroupsBPX Switch Plug-In Card Summary Card Name Where BME SmfxlrLM-2OC3-SMF LM-2OC3-SMFLR Optional Peripherals Optional Peripherals BPX Switch Common Core BPX Switch Common Core Group Broadband Controller Card BCC-32, BCC-3, BCC-4 Common Core Group Block DiagramBroadband Controller Card BCC-32, BCC-3, BCC-4 Features Functional Description BCC-32 and BCC-3 Block Diagram BCC Front Panel Indicators Indicator FunctionFront Panel Description LAN Card BCC Front Panel Gbps Operation with the BCC-4 Back Cards for the BCC-3 and BCC-32Enter y Step Backcard Line Module for BCC-32, Connectors Connector Function EXT 1 TMG EXT 2 TMG BCC-3-bc or BCC-c Face Plate Connectors Alarm/Status Monitor Card Alarm/Status Monitor Card ASM Front Panel Controls and Indicators Controls Indicator Function Status ACO LM-ASM Face Plate Connectors Line Module for the Alarm/Status Monitor CardConnector Indicator Function LMI-ASM Face Plate BPX Switch StrataBus 9.6 and 19.2 Gbps Backplanes BPX Switch StrataBus 9.6 and 19.2 Gbps Backplanes 18Cisco BPX 8600 Series Reference BXM Cards, Trunk Mode Summary BPX Switch Network Interface GroupNetwork Interface Trunk Cards Broadband Network Interface Cards BNI-T3 and BNI-E3 Broadband Network Interface Cards BNI-T3 and BNI-E3 Egress Simplified BNI-T3, BNI-E3 Block Diagram Ingress Bandwidth Control Front Panel Indicators Loopbacks and DiagnosticsBNI Front Panel Status Indicators Status LED color Status Description Status port LM-3T3 and LM-3E3 Connectors T3 and E3 Line Modules LM-3T3 and LM-3E3Port 1 RX TX Port 2 RX TX T3 and E3 Line Modules LM-3T3 and LM-3E3 LM-3T3 Face Plate, Typical LM-3E3 Face Plate, Typica Broadband Network Interface Cards, BNI-155 OverviewEgress Ingress CBR VBR Simplified BNI-155 Block Diagram Act Stby Fail Failure Description 7BNI-155 Front Panel LM-OC3-SMF and LM-OC3-SMFLR Connectors Function LM-OC3-MMF Connectors FunctionOC3, Line Modules SMF, SMFLR, & MMF OC3, Line Modules SMF, SMFLR, & MMF LM-2OC3-SMF Face Plate LM-2OC3-MMF Face Plate Cabling of BNI Backcard, SMF-2-BC Cabling of BNI Backcard, SMF-2-BC 20Cisco BPX 8600 Series Reference BPX Switch Service Interface Group Summary Service Interface Line CardsBXM Cards, Port UNI Mode Summary ASI-1, ATM Service Interface Card ASI-1, ATM Service Interface Card Egress Configuring Connections ATM over ASI Example Monitoring Statistics 6Cisco BPX 8600 Series Reference ASI-1 Front Panel LM-2T3 Module LM-2T3 Module Line Module, ASI, 2T3 LM-2E3 Module LM-2E3 Module Line Module, ASI, 2E3 ASI-155, ATM Service Interface Card ASI-155, ATM Service Interface Card Configuring Connections ASI-155 Simplified Block Diagram Service Interface Line Cards ASI-155 Front Panel BXM Cards, Access UNI Mode ASI-155 Line Module, LM-2OC3-SMFASI-155 Line Module, LM-2OC3-SMFLR ASI-155 Line Module, LM-2OC3-MMF BXM Cards, Access UNI Mode Tag Switching BXM T3/E3, 155, BXM Cards Dynamic Resource Partitioning for SPVCsDynamic Resource Partitioning for SPVCs BXM Cards T3/E3 45 Mbps/34Mbps OC3/STM-1 155.52 MbpsOC12/STM-4 622.08 Mbps BPX-T3/E3-BC Features BXM CapabilitiesT3/E3 45 Mbps/34 Mbps OC3/STM-1 155.520 Mbps ATM Layer BXM Capabilities Service Types CBR ServiceVBR Service ABR Service BXM Front Card Indicators BXM Front Panel Status IndicatorsBXM Front Panel Card Failure indicators Card Operation Card BXM-155 Front Panel, Eight-Port Card Shown BXM-T3/E3 Front Panel, 12-Port Card Shown BXM, Backcard Connectors BXM-622 BackcardsBXM-155 Backcards BXM-T3/E3 Backcards SMF-622-2, SMFLR-622-2, and SMFXLR-622-2 Back Card BXM-155-8 Port Backcard, MMF, SMF, or Smflr BPX-T3/E3 Back Card, 12-Port Option Shown Cabling of SMF-622 Series Backcards Y-Cabling of SMF-622 Series Backcards BXM Functional Description Overview, Port UNI ModeBXM Functional Description BXM Port Access UNI Ingress Operation 10 BXM Port Access, UNI Egress Operation Overview, Trunk Mode BXM Trunk Ingress Operation BXM Trunk Egress Operation Detailed Description, Port UNI and Trunk Modes DeMux/Mux Ingress and Egress Queue Engines ACP Subsystem Processor Fault Management and Statistics Fault Management and Statistics, Port UNI ModeAlarms Performance Monitoring Fault Management and Statistics, Trunk Mode Technical Specifications Technical SpecificationsPhysical Layer General Information General Sonet Notes General Sonet NotesSonet Section, Line, and Path Descriptions Unit Description User Commands DiagnosticsConnection Provisioning Test Configuring Connections Configuration ManagementConfiguring Connections Syntax Configuring Connections Field Value Description Command Line Interface Examples Command Line Interface Examples An example of the addtrk command follows An example of the cnfln command follows An example of the cnfportq command follows An example of the upport command follows An example of the cnfcls command for class 2 follows YourID1 BPX Jan 1998 0241 GMT An example of the cnfabrparm command follows An example of the dsplns command follows 40Cisco BPX 8600 Series Reference Resource Partitioning Dynamic Resource Partitioning for SPVCsSummary Resource Partitioning ASI SVC Resource Partitioning Shown in the following example Example ASI cnfportq Command Example BXM cnfport Command BXM SVC Resource Partitioning NNI Trunk SVC Resource Partitioning BNI Trunk SVC Resource Partitioning TS,NTS,FR,FST,CBR,VBR,ABR Example BNI cnftrkparm Command BXM Trunk SVC Resource Partitioning Example BXM cnftrk Command ATM Connection Services ATM Connections SVCs SVCs Traffic Management Overview Traffic ParametersQoS Parameters Other Attributes Vsvd Description Standard ABR notesBXM Connections ForeSight Congestion Control ATM Connection RequirementsATM Connection Requirements Connection Routing Addcon Command SyntaxField Value Description ATM Connection Configuration ATM Connection Configuration CLP0+1 SCR Flow Default Setting OC12 Range ASI T3/E3 Range ASI-155 Range BXM T3/E3, OC3 RIF ICRRDF PCR CdvtVsvd SCR IBS CBR Connections CBR Policing Definitions ATM Forum TM Spec PCR Flow VBR and Atfr Connections VBR Connections Atfr Connections Atfr Connection Prompt Sequence ABR and Atfst Connections ABR NotesABR Connections ABR Standard Connection Prompt Sequence Meaning of Vsvd and Flow Control External Segments Atfst Connections ABR ForeSight Connection Prompt Sequence Atfst Connection Prompt Sequence UBR Connections UBR Policing Definitions ATM Forum TM Spec PCR Flow Traffic Policing Examples Dual-Leaky Bucket An AnalogyCBR Traffic Policing Examples Traffic Policing Examples 11 CBR Connection, UPC Overview LP=1 12 CBR.1 Connection with Bucket Compliant VBR Dual-Leaky Bucket Policing Examples VBR.1 14 VBR Connection, UPC Overview Leaky Bucket Examples 15 VBR Connection, Policing = 4, Leaky Bucket 1 Compliant CLP=0 VBR.2 LP=0 18 VBR.2 Connection, Leaky Bucket 2 Discarding CLP 0 Cells VBR.1 VBR.3 ABR Connection Policing UBR Connection Policing 21 UBR Connection, UPC Overview Traffic Shaping for CBR, VBR, and UBR ConfigurationTraffic Shaping for CBR, VBR, and UBR LMI and Ilmi Parameters Traffic Shaping Rates ATM and Frame Relay SVCs, and SPVCs ATM and Frame Relay SVCs and SPVCs PVCs and SVCs PVCsSPVCs ATM and Frame Relay SVCs and SPVCs SVCs Interim Inter-switch Protocol Routing BPX Switch and ESP InterfacesBPX Switch and ESP Interfaces UNI Signaling Channel Signaling PlaneSignaling Plane NNI Signaling Channel UNI Signaling Channels Network Interworking Between Frame Relay and ATM Network Interworking Between Frame Relay and ATM Extended Services Processor Extended Services ProcessorESP Interfaces Stand-Alone ESP Redundant ESPs Cable Redundancy ESP Y-Cable Redundancy Other Redundancy Options Resource Partitioning Tag Switching Introduction Tag Switching Overview Tag Switching BenefitsTag Switching Benefits Elements in a Tag Switching Network Tag Switching Operation at LayerElements in a Tag Switching Network Forwarding Tag Switching in an ATM WAN Tag Switching in an ATM WANControl Tag Forwarding Information Base Tfib in an ATM Environment Downstream on Demand Tag Allocation, Conservative Mode Shown Tag Switching and the BPX Tag Switching and the BPX BPX Tag Switching Virtual Switch Interfaces BPX Switch VSI Interfaces Connection Setup, End Points on same VSI Slave Tag Switching Resource Configuration Parameters Tag Switching Resource Configuration Parameters Configuring VSI Lcns Useful Default Allocations Details of More Rigorous Allocations Port VSI Partition LCN Allocation Elements List of Terms RequirementsRequirements Related Documents Configuration ManagementRelated Documents Configuration Criteria Cnfqbin CommandCnfrsrc Command Configuration Criteria Cnfrsrc Parameter Summary Example Parameter cnfrsrc Value Description Configuration Example Resetcd 4 hConfiguration Example Dspcds Status Active Revision CD18 Max PVC bandwidth Partition Enabled e VSI min LCNs Uptrk 4.1 uptrk 4.2 uptrkCnfrsrc VSI start VPI VSI end VPI VSI min b/w VSI max b/w 22Cisco BPX 8600 Series Reference Dspqbin 4.1 Cnfqbin 4.1 Enable/disable eCnfqbin 4.1 10 e 0 65536 95 100 Addshelf 4.1 vsi 1 Checking and Troubleshooting Checking and TroubleshootingTsc# show controllers VSI descriptor Dsptrks Dspnode Dsprsrc 4.1 Tsc# reload Tsc# show tag intTsc# sho tag tdp disc Statistics Provisioning and Managing ConnectionsProvisioning and Managing Connections Command Reference BPX Switch CommandsTSC Commands Command Reference Related Commands AddshelfSyntax Attributes Description for Tag Switching Example for Tag Switching Example for Interface Shelves Description for Interface ShelvesAddshelf 11.1 a Related Commands dspqbin Parameters-cnfqbin BPX switchCnfqbin Example Description Cnfqbin 4.1 10 e 0 65536 95 100 Cnfrsrc Related Commands Parameters-cnfrsrcParameter cnfrsrc Description Cnfrsrc Parameter cnfrsrc Description Here, ax = 256, n1x = 512, and m1x = 10 Port VSI Partition LCN Allocation Elements Example 1, 8-Port OC3 BXM Configured in Trunk Mode Cnfrsrc Port VSI Partition = Total Lcns available toPort N1x Unallocated Min z1 + n1x, max M1x LCNs Example 2, 8-Port OC3 BXM Configured in Port Mode 44Cisco BPX 8600 Series Reference 120 3000 3500 4907 7588 100 IPX switch, IGX switch, BPX switch DspcdParameters-dspcd Dspcd Dspcds Parameters-dspcdsSyntax dspcds l Example dspcds Dspcds KDJ Dspnode BPX switch, IGX switch YesDspnode 50Cisco BPX 8600 Series Reference Related Commands cnfqbin Parameters-dspqbin DspqbinExample dspqbin 4.1 Dspqbin Example dspqbin 4.1 10 Sample Display Related Commands cnfrsrc Parameters-dspcds DsprsrcExample dsprsrc 4.1 Dsprsrc Dsptrks Dsptrks Example Resetcd Example resetcd 5 HYes IPX switch, IGX switch, BPX switch Resetcd Yes BPX switch UpportExample upport Upport System Response Uptrk Parameters-uptrkOptional Parameters-uptrk Example uptrk Uptrk BME Multicasting BME Features StandardsMulticasting Benefits Multicasting Overview Connection Management Criteria Connection Management with Cisco StrataView PlusBME Restrictions Address Criteria BME Cell Replication BME OperationBME Operation Group Action Command Cell Replication StatsAdding Connections Group Multi-Segment Multicast Connections Multicast Statistics Alarms AlarmsPolicing OAM cells Hot Standby Backup Hot Standby BackupAIS cells Connection Diagnostics ConfigurationConfiguration Configuration Management Repair and Replacement Preventive MaintenanceTroubleshooting the BPX Switch General Troubleshooting Procedures Troubleshooting the BPX Switch Troubleshooting the BPX Switch Symptom Probable Cause Remedy Symptom Probable Cause Remedy Card Status for the BPX Switch Displaying the Status of Cards in the NodeCard Type Status Description BCC Replacing Parts Replacing PartsReplacing a Front Card Replacing Parts Step Top of the grille should pop out Replacing a Line Module Unlatching the Air Intake Grille 11-8Cisco BPX 8600 Series Reference Replacing a DC Power Entry Module Removing a Line Module DC Power Entry Module with Conduit Box Replacing an AC Power Supply AC Power Supply Assembly Field-Installing a Second AC Power Supply Removing Blank Filler Panel B side shown Replacing the Fan Assembly Replacing the Temperature Sensing Unit Replacing Card Slot and Fan Fuses on the System Backplane Card Slot and Fan Fuse Locations on System Backplane 11-16Cisco BPX 8600 Series Reference Frame Relay to ATM Network and Service Interworking Frame Relay to ATM Network and Service Interworking 12-2Cisco BPX 8600 Series Reference Service Interworking Networking Interworking Networking Interworking MUX FRP BUS AIT BNI ATF Connections, Simplified Example ATM Protocol Stack ATM Protocol StackATM Layers AIT/BTM Interworking and the ATM Protocol Stack AIT/BTM Interworking and the ATM Protocol Stack Protocol Stack Operation AIT/BTM Control Mapping, Frames and Cells Features Management, OAM CellsATF Summary Limitations Some ATF Connection Criteria Connection ManagementPort Management Addcon Cnfcls Cnfcon Delcon Dspcls Dspcon Dspcons Channel Statistics StructureCnfport Cnfportq Clrchstats Cnfchstats Dspchstats Dspchstatcnf Dspchstathist OAM Cell Support DiagnosticsDspalms Dspcon Dspport Tstconseg Tstdly Virtual Circuit Features User Commands Management AUser CommandsManagement Bandwidth Management RoutingUser Interface Signaling Alarms Routing Hubs and Interface Shelves Tiered NetworksBPX and IGX Routing Hubs Routing Hubs and Interface Shelves Tiered Network with BPX and IGX Routing Hubs Tiered Network Implementation BPX Routing Hubs in a Tiered NetworkBPX Routing Hubs in a Tiered Network General UpgradesDefinitions Co-locating Routing Hubs and Interface Shelves Network Management IPX Interface Shelf Description ForeSightPreferred Routing Local and Remote Loopbacks Alarm Management of Interface Shelf on the BPX Hub Node Configuration and ManagementInterface Shelf Management Alarm Management on the IPX Interface Shelf Port ManagementConnection Management Bandwidth Management IGX Routing Hubs in a Tiered Network IGX Routing Hubs in a Tiered Network IGX Shelves and Routing Hubs, Frame Relay Connections General Co-locating Routing Hubs and Shelves IGX Interface Shelf Description Shelf Management User Interface Commands Alarm Management of Interface Shelf on the IGX Hub NodeAlarm Management on the IGX Interface Shelf Shelf Data Connection Commands Data Channel CommandsVoice Connection Commands Voice Channel Commands Cisco StrataView Plus NMS Cisco StrataView Plus NMS 13-18Cisco BPX 8600 Series Reference BPX Snmp Agent Snmp Overview 1shows an Snmp manager and the nodes within a domain Snmp Overview Snmp Functions Snmp Functions Responses to Get Get-Next Requests ATM Set Requests Responses to Set Requests MIB II SupportMIB II Support Cisco WAN Switching Proprietary MIB Structure Switch Service ObjectsSwitch Connections Cisco WAN Switching Proprietary MIB Structure Endpoint Statistics Bandwidth ClassEndpoint Mapping 14-8Cisco BPX 8600 Series Reference BPX Node Specifications General General Characteristic T3 DS3 ATM Trunk Interface BXM-T3/E3 CardsATM Trunk Interface BXM-155 Cards ATM Trunk Interface BXM-T3/E3 Cards SMF LR ~40 KM ATM Trunk Interface BXM-155 Cards ATM Trunk Interface BXM-622 Cards ATM Trunk Interface BXM-622 CardsSMF IR TX SMF IR RX SMF LR TX SMF LR RX ATM T3 Trunk Interface BNI-T3, LM-3T3 ATM T3 Trunk Interface BNI-T3, LM-3T3 ATM E3 Trunk Interface BNI-E3, LM-3E3 ATM E3 Trunk Interface BNI-E3, LM-3E3 ATM OC3 Trunk Interface BNI-OC3, LM-OC3 ATM OC3 Trunk Interface BNI-OC3, LM-OC3 ATM Service Interface BXM-T3/E3 Cards ATM Service Interface BXM-155 CardsATM Service Interface BXM-622 Cards ATM Service Interface BXM-T3/E3 Cards ATM Service Interface ASI-1, LM-2E3 ATM Service Interface ASI-1, LM-2T3ATM Service Interface ASI-1, LM-2T3 ATM Service Interface ASI-2, LM-OC3 ATM Service Interface ASI-2, LM-OC3 12Cisco BPX 8600 Series Reference BPX Switch Cabling Summary Power CablingAC Powered Nodes Trunk Cabling DC Powered Nodes Table B-3 DC Power Wiring Cable Parameter DescriptionLM-BCC Cabling Auxiliary and Control Port Cabling LAN Port Cabling Modem CablingTable B-6 LAN Port Cabling Cable Parameter Description Table B-7 LAN Port Pin Assignments Pin # Name T1 Clock Cabling External Clock Input CablingLM-BCC Cabling E1 Clock Cabling Table B-12through Table B-15lists E1 clock cabling details External Alarm Cabling Standard BPX Switch CablesExternal Alarm Cabling Table B-17 Network Alarm Pin Assignments Description Table B-19 Redundancy Y-Cables Used On Cisco P/N Redundancy Y CableLM-BCC TBS Redundancy Y Cable BPX Switch Peripherals Cisco StrataView Plus Terminal Control Port, Local Control Table C-3 Switch a Settings-Okidata 184 Printer Description DIP Switch Settings for OkidataPrinter Table C-5 Switch 2 Settings-Okidata 184 Printer Description Table C-4 Switch 1 Settings-Okidata 184 Printer DescriptionPrinter Motorola V.34R BPX Switch Dial-In Configuration BPX Switch Auto-Answer Dial-In to BPX switchModems, Dial-In and Dial-Out Modems, Dial-In and Dial-Out ATL1 ATSØ=1AT\N3 AT%C IPX Auto-Dial to Customer Service AT\Q1 AT\JAT\T3 8Cisco BPX 8600 Series Reference AT3-6ME Interface Adapter Application Equipment Description Interface ConnectorsEquipment Description Table D-1 Rear Panel Connectors Type Description T3 RX BNCT3 TX BNC DB9 Table D-2 Front Panel Indicators Color Description DIP SwitchesFT2 Front and Rear Panel FT2 Installation AT3-6ME ConfigurationInstallation Table D-3 DIP Switch SW-1 Selection Guide Position Function Power-Up Sequence BPX, IGX, or IPX Port ConfigurationOperation Normal Operation Remote Loop OperationTerminal Operation Operation Table D-6 DIP Switch Settings CommandsTable D-7 Command Summary Parameters Meaning Specifications Specifications Table D-8 Status DisplayT3 interface BPV NNN Power SpecificationsT2 Interface Mechanical 12Cisco BPX 8600 Series Reference Glossary ARC Alarm Relay Card ARI Alarm Relay Interface CardARM Alarm Relay Module ASM Alarm/Status Monitor Cards B8ZS Bipolar with Eight Zero Suppression Bandwidth reservationChannel BC-E1 Backcard E1 BPX Switch CAS Channel Associated SignallingCcdv Compliant Cell Delay Variation CCS Common Channel Signalling CGA Carrier Group Alarm CellCell relay Circuit line COS Class of Service Crosspoint switchCSU Channel Service Unit Dacs Digital Access and Control System DDS Digital Data Service Dial Access SwitchingDS0 Digital Signal DS1 Digital Signal DSI Digital Speech Interpolation DTE Data Terminal EquipmentECN Explicit Congestion Notification Fast EIA Frame Relay Service Frame forwardingFPC FastPAD Back Card Frame relay connection class IGX Switch FTC FastPAD Trunk CardFTM FastPAD Trunk Module Gateway IPX Switch Isdn Integrated Services Digital NetworkJunction node Junction trunk Local alarm Major alarmMinor alarm Local addressing Packet switching NPC Network Processor CardNPM Network Processor Module Nrm Partially-interleaved EIA PBX private branch exchangePCM Pulse Code Modulation PCR Peak Cell Rate Red alarm Remote alarmRobbed bit signaling 921/Q.931 SAR Segmentation and Reassembly RS-449SCC System Clock Card SCM System Clock Module SVC switched virtual circuit Speech detectionSplit clock Status Enquiry Timestamp TrmTrunk Trunk conditioning Voice Network Switching VAD Voice Activity DetectionVBR Variable Bit Rate Virtual circuit Cables Yellow alarmCable redundancy ABR STD AdtfASI ATM Dlci ESPFbtc FRF.4 Frtt Pnni SAMSnmp Spvc Tftp TSRVCI VPI Documentation Response Card Strongly agree Strongly disagree Business Reply Mail